In order to predict the microstructure process parameters of the microlens array glass during molding, a finite element analys is model of the microlens array is established using the advanced nonlinear finite element software MSC.Marc in this study. The array optical elements with different microstructural widths are divided into several groups. The influence of the microstructural height of each group of the chalcogenide array optical elements on the equivalent von Mises stress is calculated by the finite element analysis model; subsequently, we obtain the influences of chalcogenide glass microlens array structures with the same microstructural width and different microstructural heights on the equivalent von Mises stress after the molding. The maximum equivalent von Mises stress of array optical elements with the same microstructural width and different microstructural heights is fitted, and the trend of equivalent von Mises stress is analyzed to obtain the ratio of the microstructural height to the width of the chalcogenide glass Ge₂₃Se₆₇Sb₁₀ array optical elements suitable for molding. The simulation results show that the lower the microstructural height is, the lower the equivalent von Mises stress is. The equivalent von Mises stress of the chalcogenide glass microlens array increases gradually from the center to the edge and is the highest at the edge. When the ratio of the microstructural height to the width is greater than 0.322, the equivalent von Mises stress generated by the molding increases greatly.